Use Grapefruit seed extract to gargle or take a few drops in water or juice. Also use as a mouthwash facial & nail cleanser skin rinse & household cleanser. Ideal for travelling. Not for citrus allergy sufferers. Suggested intake & usage Never use undiluted By mouth Take 412 drops in a full glass 300ml of water or juice betweenmeals 13 times a day children over 8 years half dose or as your healthprofessional advises. Do not exceed recommended daily intake. Mouthwash 412